Fix test for jest ≥ 27

Closes: #997579

debian/patches/fix-test.patch

+Description: fix test
+ See: https://jestjs.io/docs/configuration#testenvironment-string
+Author: Yadd <yadd@debian.org>
+Bug-Debian: https://bugs.debian.org/997579
+Forwarded: no
+Last-Update: 2021-10-24
+
+--- a/test/test.js
++++ b/test/test.js
+@@ -1,3 +1,7 @@
++/**
++ * @jest-environment jsdom
++ */
++
+ import addStylesClient from '../lib/addStylesClient'
+ import addStylesServer from '../lib/addStylesServer'
+ 

debian/patches/series

 babel7-compat.patch
+fix-test.patch